1979. Bigu a Tipan [The New Testament in Casiguran Agta]. New
York: New York International Bible Society (translator).

1974. A Dumagat (Casiguran) - English Dictionary. Canberra:
Department of Linguistics, Research School of Pacific Studies, the Australian
National University. (Co-author with Janet Headland). Reviewed in:Philippine Quarterly of Culture & Society 1976;
Philippine J of Linguistics 1977.